Estrogen is a hormone that binds to a receptor on the surface of some cells.This binding causes regulatory molecules in the nucleus to interact with a segment of DNA that precedes some genes.This interaction activates the gene and causes gene expression.The segment of DNA that the regulatory molecules bind to is called a

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The segment of DNA that regulatory molecules bind to is called a promoter. A promoter is a specific region of DNA that initiates the transcription of a particular gene. It is located upstream of the target gene and provides a binding site for RNA polymerase, which begins the process of transcription. The regulatory molecules activated by estrogen binding to its receptor on the cell surface interact with the promoter to activate gene expression.

Estrogen Is a Hormone That Binds to a Receptor on the Surface